Question 816014
a) log base 7(4/y)
=
log7(4) - log7(y)

b) {{{log2(x^4*12)}}}
{{{log2(x^4)+log2(12)}}}
{{{4log2(x)+log2(12)}}}

c) {{{log5(10x^3/y^5)}}}
 {{{log5(10x^3)-log5(y^5)}}}
 {{{log5(10)+3log5(x)-5log5(y)}}}